Lavatory basin



FIG. 1 is a perspective view of the lavatory basin.

FIG. 2 is a top plan view of the lavatory basin.

FIG. 3 is a bottom plan view of the lavatory basin.

FIG. 4 is a front elevation view of the lavatory basin.

FIG. 5 is a back elevation view of the lavatory basin.

FIG. 6 is a left elevation view of the lavatory basin; and,

FIG. 7 is a right elevation view of the lavatory basin.

The broken lines in the drawings illustrate subject matter which forms no part of the claimed design. 

CLAIM The ornamental design for a lavatory basin, as shown and described. 